土工基础

›› 2014, Vol. 28 ›› Issue (4): 41-43.

• 工程实录 • 上一篇    下一篇

金坛层状盐岩的基本力学特性

黄孟云1,刘 伟2   

  1. （1.中国石油化工股份有限公司 天然气川气东送管道分公司 金坛储气库项目部,江苏金坛 213200;
    2.中国科学院 武汉岩土力学研究所,武汉 430071)
  • 收稿日期:2014-04-04 出版日期:2014-08-20 发布日期:2014-08-27
  • 作者简介:黄孟云（1962-），男，硕士，高级工程师，研究方向为天然气勘探开发和盐穴储气库工程建设。
  • 基金资助:

    基金项目：国家自然科学基金资助项目（51274187）

Mechanical characteristics of the bedded rock salt from Jintan Salt Mine

HUANG Mengyun1,  LIU Wei2   

  1. （1.Jintan Gas Storage Project, SINOPEC SichuantoEast Natural Gas Transmission Pipeline Co., Jintan, Jiangsu 213200；
    2.Institute of Rock and Soil Mechanics, Chinese Academy of Science, Wuhan 430071）
  • Received:2014-04-04 Online:2014-08-20 Published:2014-08-27

摘要： 拟在江苏金坛深部盐岩地层中开展战略能源储备建设工作。地层的力学特性是开展造腔方案设计、稳定性评价等的基础。基于此，针对所取层状盐岩系统开展了单轴、三轴、直剪和劈裂试验。通过试验研究表明：（1）金坛盐岩属于典型软岩，单轴仍以脆性劈裂为主，三轴压缩下强度大大提高，塑性变形能力大大增强，适合储气库的变形要求；（2）夹层的存在提高了盐岩强度，对盐岩具有加紧作用，有利于腔体稳定性；（3）界面的强度与盐岩和夹层相当，不是一个弱面，有利于维持储气库的稳定性和密闭性。研究结果为金坛储气库的建设提供了重要依据。

关键词: 能源储库, 岩盐, 力学特性, 界面, 稳定性

Abstract: Energy storage caverns in salt formations of a Jintan salt mine are proposed. The mechanical properties are fundamental aspects of cavern design, stability evaluation. The laminar salt rock samples are systematically studied throughout uniaxial, triaxial, direct shear and split tests. The test results indicate: the Jintan salt rock samples are soft rock mass. The split failure is the major failure mode under the uniaxial compression tests. The shear strength as well as the plasticity under triaxial shear tests is increased. The lenses of other rock type in the salt rock increase the strength of the salt rock and therefore improve the stability of the rock cavern. The interface between the salt rock and other rock type is not a weak zone and its strength is similar to that of salt rock. The strong interface strength is beneficial to the gas storage cavern and its airtight properties.

Key words: Energy Storage Caverns, Salt Rock, Mechanical Properties, Interface, Stability